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3 days ago · Oxygen is the most abundant chemical element by mass in the Earth's biosphere, air, sea and land. Oxygen is the third most abundant chemical element in the universe, after hydrogen and helium. About 0.9% of the Sun's mass is oxygen.
4 days ago · Learn about oxygen, a nonmetallic element essential for life, from Britannica. Find out how it was discovered, how it forms compounds and isotopes, and how it occurs in nature and industry.
2 days ago · The amount of oxygen flowing in the blood is called the blood's oxygen level. Understanding blood oxygen levels is crucial for maintaining good health and well-being. This vital measurement can help detect potential health issues, such as respiratory conditions or circulatory problems, allowing for timely intervention and care.
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1 day ago · Normal arterial blood oxygen saturation levels in humans are 97–100%. If the level is below 90%, it is considered low and called hypoxemia. Arterial blood oxygen levels below 80% should be promptly addressed as it might compromise organ function, such as the heart and brain. Continued low oxygen levels might lead to cardiac or respiratory arrest.
4 days ago · Diving medicine, hyperbaric medicine, neonatal medicine. Oxygen toxicity is a condition resulting from the harmful effects of breathing molecular oxygen ( O. 2) at increased partial pressures. Severe cases can result in cell damage and death, with effects most often seen in the central nervous system, lungs, and eyes.
5 days ago · Cascading oxygen loss also interacts with other stressors, such as rising ocean temperatures and acidification, making marine environments even more inhospitable. This complex interplay of factors can lead to widespread and persistent deoxygenation, significantly impacting ocean health and the services it provides to human societies, such as fisheries and carbon sequestration.
3 days ago · Insect respiration is commonly thought to rely solely on direct gas exchange through air-filled tracheal tubes. The discovery of oxygen-transporting blood cells in fly larvae reveals a previously ...
